package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.anno.AutoFillAnnotation;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.UUID;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    private Integer defaultPassword = 123456;

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex((employee.getSalt()+password).getBytes());



        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    /**
     *
     * 员工添加
     * @param employeeDTO
     */
    @Override
    @AutoFillAnnotation
    public void insertEmp(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();//创建员工对象用于数据的添加与传递

        BeanUtils.copyProperties(employeeDTO,employee);//将数据给到employee
//设置时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//设置操作人的id
//        Long id = BaseContext.getCurrentId();
//        employee.setCreateUser(id);
//        employee.setUpdateUser(id);
//设置密码
        String split = UUID.randomUUID().toString().replace("-","");
        String password = split + defaultPassword;
        String password1 = DigestUtils.md5DigestAsHex(password.getBytes());

        employee.setSalt(split);
        employee.setPassword(password1);

        employeeMapper.insertEmp(employee);
    }

    /**
     * 员工分页查询
     * @param empDto
     * @return
     */
    @Override
    public PageResult selectByName(EmployeePageQueryDTO empDto) {
        PageHelper.startPage(empDto.getPage(), empDto.getPageSize());//开始分页

        Page<Employee> employeePage =  employeeMapper.selectByName(empDto.getName());

        PageResult pageResult = new PageResult();

        pageResult.setTotal(employeePage.getTotal());

        pageResult.setRecords(employeePage.getResult());

        return pageResult;
    }

    @Override

    public void updateStatus(Integer status, Long id) {
        employeeMapper.updateStatus(status,id);
    }

    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        return employee;
    }

    @Override
    @AutoFillAnnotation(OperationType.UPDATE)
    public void updateEmp(Employee employee) {
        Long id = BaseContext.getCurrentId();

//        employee.setUpdateUser(id);
//
//        employee.setUpdateTime(LocalDateTime.now());

        employeeMapper.updateEmp(employee);
    }

}
